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KAI WEI XI CHAN PIN FEN LEI

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve
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ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve

Model：ZJHF46-10C / ZJHF46-16C / ZJHF46-10P / ZJHF46-16P
Specification：DN20-DN200
Temperature：-20~150℃
Medium：Highly toxic, strongly corrosive, volatile and permeable media

Pressure：PN1.0, PN1.6
Connection method：Flange
Driving method：Pneumatic
Material：Cast Steel + Fluorine Lining (PTFE Lined)，Stainless Steel + Fluorine Lining (PTFE Lined)

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ZJHF Pneumatic Fluorine-lined Bellows Sealed Control ValveOverview

ZJHF pneumatic fluorine-lined bellows sealed control valve is a precision execution unit specifically engineered for highly corrosive media and toxic or volatile fluids. It integrates a multi-spring pneumatic diaphragm actuator with a single-seated valve body lined with fluoroplastics (FEP/F46 or PFA), featuring an innovative double-sealing structure combining bellows and packing. By receiving standard 4-20mA DC signals from control systems, the actuator converts air pressure into linear displacement to drive the stem for precise regulation in aggressive environments. With all wetted parts covered by high-performance fluorine plastics and the bellows seal ensuring zero stem leakage, this valve is widely utilized in petrochemical, fine chemical, pharmaceutical, and acid-alkali production where safety and anti-corrosion requirements are paramount.

Product Image of ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control ValveCharacteristic

1. Superior corrosion resistance:All internal surfaces in contact with the medium, including the body cavity, plug, and seat, are fully lined with fluoroplastics (e.g., F46/PFA). This material offers exceptional chemical inertness against almost all strong acids, alkalis, and oxidants.
2.Zero-leakage double sealing:The stem seal utilizes high-performance bellows as the primary seal, creating an absolute airtight barrier to eliminate leakage. Secondary packing seal is provided as a fallback to ensure system safety even if the bellows fails.
3.Precision pneumatic actuator:Equipped with a compact multi-spring pneumatic diaphragm actuator, providing low height, light weight, and high output force. Paired with a smart positioner, it achieves excellent linearity and repeatability.
4.Intrinsically safe attributes:Driven by compressed air without electrical signals in hazardous zones, providing natural explosion-proof safety. Available in air-to-open or air-to-close modes for fail-safe positioning upon air supply loss.
5.Optimized low-flow resistance path:The internal flow path is smooth and streamlined, significantly reducing pressure drop. The single-seat sealing design combined with precision-ground surfaces ensures bubble-tight shut-off.
6.Excellent vacuum resistance:Advanced compression molding ensures the lining is tightly bonded to the metal substrate, effectively preventing lining peeling or collapse under vacuum or negative pressure conditions.
7.Broad temperature and pressure adaptability:Suitable for aggressive conditions from -20°C to 150°C. The thermal expansion coefficient of the lining is optimized for dimensional stability under temperature fluctuations.
8.Modular maintenance design:The compact structure features a scientific connection between actuator and body. Key internals like the lined plug and seal kits are modular for easy replacement, reducing downtime and maintenance costs.

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valvestructure principle

Structural Drawing of ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve

List of Component Names and Materials

Part Name	Material Description
Valve body	Cast Steel + Fluorine Lining (PTFE Lined)，Stainless Steel + Fluorine Lining (PTFE Lined)
Bellows	F4 (PTFE), *Hastelloy alloy
Diaphragm cover	SPHC steel plate
Valve seat, valve core	F46, Hastelloy alloy, A Monel alloy
Packing	F4, flexible graphite
Spring	60Si2Mn

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valvetechnology parameter

Performance Specification Sheet

Performance Specification Sheet
Nominal Pressure	1.0	1.6	MPa
Strength test pressure	1.5	2.4
Sealing test pressure	1.1	1.76
Applicable Temperature	-20-150		℃

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valvestandard size

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline Drawing of ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve

Outline dimension table(Unit: mm)

Nominal Diameter（DN）	G3/4〞	20	25	32	40	50	65	80	100	125	150	200
L	120	180	185	200	220	250	275	300	350	425	460	560
H1	453	460	517	529	594	624	824	834	20848	902	920	1020
H2	50	65	70	80	79	85	100	114	162	200	240	300
A	282						360			470

Articles related to technology research and development

Dynamic balance electric control valve Patent

The utility model provides a dynamically balanced electric regulating valve, which includes a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. The valve body is internally provided with a water inlet chamber, a valve cavity, and a water outlet chamber in order towards the direction of medium flow. The valve core is in the shape of a bucket with its opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the water inlet chamber and the valve cavity. The top of the valve core is provided with a through port for medium circulation. Above the through port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve. This utility model can filter the medium, is simple to install, time-saving, labor-saving, and can reduce the medium pressure inside the valve body, extending the service life of the valve core.
1. A dynamic balance electric regulating valve, comprising a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. Its characteristic lies in that the valve body is sequentially provided with an inlet chamber, a valve cavity, and an outlet chamber in the direction of medium flow. The valve core is in the shape of a bucket with an opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the inlet chamber and the valve cavity. The top of the valve core is provided with a port for medium circulation. Above the port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve.
2. A dynamic balance electric regulating valve according to claim 1, characterized in that the bottom of the valve body is provided with a downward-opening groove, which is connected to the valve cavity through a through hole. A bottom cover connected to the valve body is arranged below the groove, and a pressure relief mechanism is arranged inside the groove. The pressure relief mechanism comprises a force-receiving member, a pressure plate connected to the force-receiving member, and a first spring arranged below the pressure plate and abutting against the bottom cover. The force-receiving member comprises a flow diversion block protruding from the through hole and a connecting rod connected to the flow diversion block, and the connecting rod passes through the pressure plate and is locked and fixed by a nut.
3. A dynamic balance electric regulating valve according to claim 2, characterized in that the top end of the pressure plate is pressed against the top wall of the groove, the bottom of the pressure plate is provided with a boss, and the top end of the first spring is sleeved on the boss.
4. A dynamic balance electric control valve according to claim 1, characterized in that the valve rod is arranged through the valve cover, a sealing cover threadedly connected to the valve cover is sleeved on the valve rod, a convex ring abutting against the valve cover is arranged on the outer circumferential wall of the sealing cover, a nut cover threadedly connected to the sealing cover is arranged at the connection between the sealing cover and the valve rod, an installation groove is arranged at the connection between the nut cover and the valve rod, a plurality of O-rings adapted to the valve rod are stacked in the installation groove, and a packing gland threadedly connected to the installation groove is arranged above the O-rings.
5. A dynamic balance electric control valve according to claim 4, characterized in that a second spring is arranged between the packing gland and the O-ring.
6. A dynamic balance electric control valve according to claim 5, characterized in that a sealing ring adapted to the valve rod is arranged inside the nut cover below the installation groove.
7. A dynamic balance electric control valve according to claim 6, characterized in that the bottom of the sealing cover is provided with a thrust ring that is threadedly connected to the sealing cover and abuts against the bottom end of the valve cover.
8. A dynamic balance electric regulating valve according to claim 1, characterized in that the top surface of the elastic sleeve is higher than the top surface of the filter cover.
9. A dynamic balance electric control valve according to claim 8, characterized in that the filter cover is connected to the valve core through threads.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

ZJHF Pneumatic Fluorine-lined Bellows Sealed Control Valve